Two-slit diffraction

These slides show how the two-slit diffraction pattern is produced by particulate photons multiply-reflected by parallel-plane reflectors. It shows that destructive interference does not occur. Changes in the pattern produced by closing either of the slitsmerely denies access to the photons that would otherwise reach the screen. The insistence on attributing these effectsto waves has falsified the current orthodoxy; it invalidates the quantum theory that has been founded upon it.